<template>
    <div class="header">
        <div class="header-topbar">
            <div class="container">
                <div class="topbar-menu">
                    <a href="javascript:;">小米商城</a>
                    <a href="javascript:;">MIUI</a>
                    <a href="javascript:;">云服务</a>
                    <a href="javascript:;">协议规则</a>
                </div>
                <div class="topbar-user">
                    <a href="javascript:;" v-if="username">{{username}}</a>
                    <a href="javascript:;" v-if="!username" @click="login">登录</a>
                    <a href="javascript:;" v-if="username" @click="logout">退出</a>
                    <a href="javascript:;" v-if="username">我的订单</a>
                    <a href="javascript:;" class="my-cart" @click="goToCart"><span class="icon-cart"></span>购物车({{cartCount}})</a>
                </div>
            </div>
        </div>
        <div class="header-nav">
            <div class="container">
                <div class="header-logo">
                    <a href="/index"></a>
                </div>
                <div class="header-menu">
                    <div class="item-menu">
                        <span>小米手机</span>
                        <div class="children">
                            <ul>
                                <li class="product" v-for="(item,index) in phoneList" :key="index">
                                    <a :href="'/product/' + item.id" target="_blank">
                                        <div class="pro-img">
                                            <img :src="item.mainImage" :alt="item.subtitle">
                                        </div>
                                        <div class="pro-name">{{item.name}}</div>
                                        <div class="pro-price">{{item.price|currency}}</div>
                                    </a>
                                </li>
                            </ul>
                        </div>
                    </div>
                    <div class="item-menu">
                        <span>RedMi红米</span>
                    </div>
                    <div class="item-menu">
                        <span>小米电视</span>
                        <div class="children">
                            <ul>
                                <li class="product">
                                    <a href="" target="_blank">
                                        <div class="pro-img">
                                            <img src="~assets/images/nav-img/nav-3-1.jpg" alt="">
                                        </div>
                                        <div class="pro-name">小米电视</div>
                                        <div class="pro-price">2799元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="" target="_blank">
                                        <div class="pro-img">
                                            <img src="~assets/images/nav-img/nav-3-1.jpg" alt="">
                                        </div>
                                        <div class="pro-name">小米电视</div>
                                        <div class="pro-price">1799元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="" target="_blank">
                                        <div class="pro-img">
                                            <img src="~assets/images/nav-img/nav-3-1.jpg" alt="">
                                        </div>
                                        <div class="pro-name">小米电视</div>
                                        <div class="pro-price">1799元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="" target="_blank">
                                        <div class="pro-img">
                                            <img src="~assets/images/nav-img/nav-3-1.jpg" alt="">
                                        </div>
                                        <div class="pro-name">小米电视</div>
                                        <div class="pro-price">1799元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="" target="_blank">
                                        <div class="pro-img">
                                            <img src="~assets/images/nav-img/nav-3-1.jpg" alt="">
                                        </div>
                                        <div class="pro-name">小米电视</div>
                                        <div class="pro-price">1799元</div>
                                    </a>
                                </li>
                                <li class="product">
                                    <a href="" target="_blank">
                                        <div class="pro-img">
                                            <img src="~assets/images/nav-img/nav-3-1.jpg" alt="">
                                        </div>
                                        <div class="pro-name">小米电视</div>
                                        <div class="pro-price">1799元</div>
                                    </a>
                                </li>
                            </ul>
                        </div>
                    </div>
                </div>
                <div class="header-search">
                    <div class="wrapper">
                        <input type="text" name="keyword">
                        <a href="javascript:;"></a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
    import {getProductList, getCartCount} from "../network";
    import {logout} from "network/login";

    export default {
        name: "NavHeader",
        data() {
            return {
                phoneList: [],
            }
        },
        computed: {
            username() {
                return this.$store.state.username;
            },
            cartCount() {
                return this.$store.state.cartCount;
            }
        },
        methods: {
            goToCart() {
                this.$router.push('/cart')
            },
            login() {
                this.$router.push('/login')
            },
            getIndexProductList() {
                getProductList().then(res => {
                    if (res.list.length >= 6) {
                        this.phoneList = res.list.slice(0, 6) // slice取前6条数据
                    }
                })
            },
            logout() {
                logout().then(res => {
                    this.$message.success('退出成功');
                    this.$cookie.set('userId', '', {expires: '-1'});    // -1为立刻过期
                    this.$store.dispatch('saveUserName', '');
                    this.$store.dispatch('saveCartCount', '0');
                })
            },
            getCart() {
                getCartCount().then((res=0) => {
                    this.$store.dispatch('saveCartCount', res);
                })
            }
        },
        created() {
            this.getIndexProductList();
            let params = this.$route.params;
            if(params && params.from === '/login') {
                this.getCart();
            }
        },
        filters: {
            currency(value) {
                if (!value) return '0.00';
                return '¥' + value.toFixed(2) + '元';
            }
        }
    }
</script>

<style scoped lang="scss">
    @import '~assets/scss/mixin.scss';
    @import '~assets/scss/config.scss';

    .header {
        .header-topbar {
            height: 39px;
            line-height: 39px;
            background-color: #333;
            color: #b0b0b0;

            .container {
                @include flex();

                a {
                    display: inline-block;
                    color: #b0b0b0;
                    margin-right: 17px;
                }

                .my-cart {
                    width: 110px;
                    background-color: #ff6600;
                    text-align: center;
                    color: #fff;
                    margin-right: 0;

                    .icon-cart {
                        display: inline-block;
                        @include bgImg(16px, 12px, "~assets/images/icon-cart-checked.png");
                        margin-right: 4px;
                    }
                }
            }
        }

        .header-nav {
            .container {
                position: relative;
                height: 112px;
                @include flex();

                .header-logo {
                    display: inline-block;
                    width: 55px;
                    height: 55px;
                    background-color: #ff6600;

                    a {
                        display: inline-block;
                        width: 110px;
                        height: 55px;

                        &:before {
                            content: '';
                            display: inline-block;
                            @include bgImg(55px, 55px, "~assets/images/mi-logo.png");
                            transition: margin .2s;
                        }

                        &:after {
                            content: '';
                            display: inline-block;
                            width: 55px;
                            height: 55px;
                            background: url(~assets/images/mi-home.png) no-repeat center;
                            background-size: contain;
                        }

                        &:hover:before {
                            margin-left: -55px;
                            transition: margin .2s;
                        }
                    }
                }

                .header-menu {
                    display: inline-block;
                    width: 643px;
                    padding-left: 209px;

                    .item-menu {
                        display: inline-block;
                        color: #333;
                        font-weight: bold;
                        font-size: 16px;
                        line-height: 112px;
                        margin-right: 20px;

                        span {
                            cursor: pointer;
                        }

                        &:hover {
                            color: $colorA;

                            .children {
                                height: 220px;
                                opacity: 1;
                            }
                        }

                        .children {
                            position: absolute;
                            top: 112px;
                            left: 0;
                            width: 1226px;
                            height: 0;
                            opacity: 0;
                            overflow: hidden;
                            border-top: 1px solid #e5e5e5;
                            box-shadow: 0 7px 6px 0 rgba(0, 0, 0, 0.11);
                            z-index: 10;
                            transition: all .2s;
                            background-color: #fff;

                            .product {
                                position: relative;
                                float: left;
                                width: 16.6%;
                                height: 220px;
                                font-size: 12px;
                                line-height: 12px;
                                text-align: center;

                                &:before {
                                    content: '';
                                    position: absolute;
                                    top: 28px;
                                    right: 0;
                                    border-left: 1px solid $colorF;
                                    height: 100px;
                                    width: 1px;
                                }

                                &:last-child:before {
                                    border: none;
                                }

                                a {
                                    display: inline-block;
                                }

                                .pro-img {
                                    height: 137px;
                                }

                                img {
                                    width: auto;
                                    height: 111px;
                                    margin-top: 26px;
                                }

                                .pro-name {
                                    font-weight: bold;
                                    margin: 19px 0 8px 0;
                                    color: $colorB;
                                }

                                .pro-price {
                                    color: #ff6600;
                                }
                            }
                        }
                    }
                }

                .header-search {
                    width: 319px;

                    .wrapper {
                        height: 50px;
                        border: 1px solid #e0e0e0;
                        display: flex;
                        align-items: center;

                        input {
                            border: none;
                            border-right: 1px solid #e0e0e0;
                            width: 264px;
                            height: 50px;
                            text-indent: 14px;
                        }

                        a {
                            display: inline-block;
                            width: 18px;
                            height: 18px;
                            background: url(~assets/images/icon-search.png) no-repeat center;
                            background-size: contain;
                            margin-left: 18px;
                        }
                    }
                }
            }
        }
    }
</style>
